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    块级
    <h1>标题</h1>
    <p>段落</p>
    <ul>
        <li>无序列表</li>
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行内<br><br>
    <a href="#">超链接</a>
    <span>内容</span>
    <em>着重语气</em><br><br>
行高可控行内<br>
    <img src="1.png" alt="石哥诱骗国豪图">
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